The generation of high rise buildings and their important advantages

High rise buildings are becoming more prominent these days due to following reasons like scarcity of land , increasing demand for business and residential space , economic growth , technological advancement , innovations in structuralsystems, desire for aesthetics in urban settings cultural significance and prestige and human aspiration to build higher

The primary structural skeleton of a tall building can be visualized as a vertical cantilever beam with its base fixed in the ground. The structure has to carry the vertical gravity loads and the lateral wind and earthquake loads. Gravity loads are caused by dead and live loads. Lateral loads tend to snap the building or topple it. The building must therefore have adequate shear and bending resistance and must not lose its vertical load-carrying capability. The skyscraper pushes down on into the ground. But when the wind blows, the columns in the windy side stretch apart, and the columns on the other side squeeze together.

The most basic method for controlling horizontal sway is to simply tighten up the structure. At the point where the horizontal girders attach to the vertical column, the construction crew bolt: and welds them on the top and bottom. as well as the side. This makes the entire steel super structure move more as one unit, like a pole, as opposed to a flexible skeleton.

For taller skyscrapers, tighter connections dont really do the trick. To keep these buildings from swaying heavily engineers have to construct especially strong cores through the center of the building. The effects of wind can also be minimized by aerodynamic shaping of the building. Wind tunnel testing considers appropriate loading for overall lateral system design and cladding design, and predicts motion perception and pedestrian level effects.

Use of damping systems as the building becomes taller and the building’s sway due to lateral forces becomes critical, there is a greater demand on the girders and columns that make up the rigid-frame system to carry lateral forces.

By clustering steelcolumns and beams in the core, engineers create a stiff backbone that can resist tremendous wind forces. The inner core is used as an elevator shaft , and the design allows lots of open space on each floor

In newer skyscrapers, like the Sears Tower in Chicago, engineers moved the columns and beams from the core to the perimeter, creating a hollow, rigid tube as strong as the core design, but weighing much, much less.

Petronas tower

PETRONAS tower is a symbol of national pride and shows the nation's advancement in the world economy and technologies. Concrete was used for its construction mainly because it was easily available and cheap when compared with steel, which was a new material for the builders. The architect successfully incorporated Malaysian and Islamic motives in the design. The sky bridge was an important feature of the design which was implemented later.

The internal corestructure is made of concrete shear walls. The building didn't require extra damping systems because the heavy structural members made of concrete. Even though no new advancements in technology were made during the project, the available technology was used smartly.

Conclusion

New improved structuralsystems and new materials in the future can lead us to even greater heights and more stable buildings. It’s not technology holding buildings back. It’s money.